During WWII, the Norden Bombsight was such a closely guarded secret that only the Manhattan Project was more hush-hush. ​ In a quiet machine shop on the outskirts of [[Burlington]],​ KY, [[Frank Milburn]] and his employees secretly made a precision part for these bombsights, complex machines instrumental to the Allied bombing raids which turned the tide of war. Milburn'​s shop was part of a network of military contractors purposefully scattered across the United States to avoid detection by the enemy.

During WWII, the Norden Bombsight was such a closely guarded secret that only the Manhattan Project was more hush-hush. ​ In a quiet machine shop on the outskirts of [[Burlington]],​ KY, [[Frank Milburn]] and his employees secretly made a precision part for these bombsights, complex machines instrumental to the Allied bombing raids which turned the tide of war. Milburn'​s shop was part of a network of military contractors purposefully scattered across the United States to avoid detection by the enemy.